rust/tests/ui/borrowck/borrowck-borrow-immut-deref-of-box-as-mut.stderr

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error[E0596]: cannot borrow `*a` as mutable, as `a` is not declared as mutable
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--> $DIR/borrowck-borrow-immut-deref-of-box-as-mut.rs:12:5
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|
LL | a.foo();
| ^ cannot borrow as mutable
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|
help: consider changing this to be mutable
|
LL | let mut a: Box<_> = Box::new(A);
| +++
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error: aborting due to previous error
For more information about this error, try `rustc --explain E0596`.